Question

Water in a canal 6m wide 1.5m deep is flowing with a speed of 10 km per hour how much area will irrigate in 30 min if 8 cm standing water is needed

Answer 1

volume of water in half hour is equal to

lbh.......(1)

l=10/2 = 5km or 5000m

h = 1.5 m

b = 6m

putting in(1)

5000×1.5×6 m3 is the volume of Canal in 1/2 hour

now,

volume of canal is equal to volume of (area irrigating land)

=area ×H =5000x1.5 x 6.......(H=8cm or 0.08m)

area=5000×1.5×6/0.08

so,

$area = 562500m {}^{2}$

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